DVD

local monitor = peripheral.find("monitor")
term.redirect(monitor)
local max_x, max_y = term.getSize()

local dvd = {}
dvd.x = max_x/2
dvd.y = max_y/2
dvd.direction_x = 1
dvd.direction_y = 1
color = {
    colors.white,
    colors.orange,
    colors.magenta,
    colors.lightBlue,
    colors.yellow,
    colors.lime,
    colors.pink,
    colors.gray,
    colors.lightGray,
    colors.cyan,
    colors.purple,
    colors.blue,
    colors.brown,
    colors.green,
    colors.red
}
local t = 1

local function reset()
    term.setCursorPos(1,1)
    term.clear()
    paintutils.drawFilledBox(1,1,max_x,max_y,colors.black)
    term.setBackgroundColor(colors.black)
end

local function update()
    reset()

    local addx = (dvd.x + dvd.direction_x)
    local addy = (dvd.y + dvd.direction_y)
    if addx >= max_x or addx <= 1 then
        dvd.direction_x = -dvd.direction_x
        t = t + 1
    end
    if addy >= max_y or addy <= 2 then
        dvd.direction_y = -dvd.direction_y
        t = t + 1
    end

    dvd.x = addx
    dvd.y = addy

    paintutils.drawPixel(dvd.x,dvd.y, color[t])
end

while true do
    update()
    os.sleep(0.5)
end